Archive for the ‘Tensilbits’ Category

Composite Tensile Test Sample Preparation

August 2, 2017

Recently, a customer sent us some composite strips to be cut into ASTM D638 Type I tensile samples.  We used the Tensilkut II, and the process was very fast and easy.

Tensilkut machines are sized for location in your testing laboratory, to be used by technicians without machining experience.  The Tensilkut II is a floor model, manually operated machine; table model Tensilkut I machines are also available for labs with less space available.  Visit our website at www.tensilkut.com or fill out the contact form below for more information on how Tensilkut can make your tensile specimen preparation easier!

40-71 Tensilbits

July 10, 2017

The 40-71 Tensilbit is a cutting bit designed specifically for use with the Tensilkut I and Tensilkut II.  This .500″ diameter Tensilbit has carbide tips brazed on a tool steel shank, giving you an economical Tensilbit which performs well.  The outside diameter is of paramount importance to the finish of your specimen, ensuring repeatability when used on the Tensilkut machine with a Tensilkut Master Template.

40-71 Tensilbit

40-71 Tensilbit: 2 flute, carbide tipped

The 40-71 Tensilbit is recommended for use when cutting such materials as steel, aluminum, copper and brass.

Tensilbits for Cutting Kevlar

May 2, 2015

Cutting Kevlar and similar non-woven fabrics into tensile test bars is tricky.  Conventional cutting methods yield irregular edges and/or fraying at the edge.

To cut a tensile test specimen from Kevlar using the Tensilkut machine, start with the 40-75 Tensilbit.  Following the standard procedure for using the Tensilkut, make progressive passes along each side until the specimen is .005″ oversized.

40-75 Tensilbit

40-75 Tensilbit

Switch to the 40-76 Tensilbit, and finish the specimen.  The diamond coating on the 40-76 will smooth the finish and remove the frayed edges, ensuring an excellent tensile specimen from Kevlar.

40-76 Tensilbit

40-76 Tensilbit

Tensilkut also manufactures the “Bow Tie Tensile Specimen” Master template.  This specification was developed specifically for testing Kevlar.

The 40-75 Tensilbit is our solid carbide, burr type Tensilbit, which has long been used in preparation of glass laminates, composites and fiberglass specimens.  The burr ensures that the fibers in Kevlar, fiberglass and other composites will be evenly cut, resulting in non-deformed edges and a good surface finish.

40-75 Tensilbit end view

40-75 Tensilbit

The 40-76 Tensilbit is a .500″ diameter tool steel shank with a diamond coating which removes material with a sanding action.  It is an excellent choice for materials which have a tendency to crack when cut, such as certain ceramics, or for finishing edges on composite or glass filled materials.

40-76 Diamond Plated Tensilbit

40-76 Tensilbit

Bothe the 40-75 Tensilbit and 40-76 Tensilbit are designed for use with the 10-20 through 10-70 series Tensilkut I, and all Tensilkut II models.  Visit our website at www.tensilkut.com for more information on preparing test specimens on the Tensilkut machine.

40-74 Tensilbits

May 2, 2015

Tensilbits are the carbide cutting tools engineered specifically for the high speed specimen cutting achieved with the Tensilkut I and Tensilkut II.  Super-sharp cutting edges combined with the proper angles of cut and relief are essential to achieve the fine shavings required for non-deformed specimen edges.  The 40-74 Tensilbit is used specifically for general plastic cutting operations, and some customers have had excellent results using the 40-74 combined with very light passes to prepare specimens from hard materials such as stainless steel.

40-74 Tensilbit for plastics and hard materials

40-74 Tensilbit for plastics and hard materials

The 40-74 Tensilbit is an 8 flute, solid carbide cutter with a shank diameter of .500″.  When used properly, Tensilbits can be resharpened, enabling you to extend their life.

40-74 8-flute, solid carbide Tensilbit

40-74 Tensilbit: 8 flute, solid carbide

The 40-74 Tensilbit is designed for use with the 10-20 to 10-70 series Tensilkut I and all Tensilkut II models.  They are in stock for immediate delivery.  Please call for a price, or visit our website at www.tensilkut.com for more information on Tensilkut machines, Tensilbits and Tensilkut Master Templates.

40-73 Tensilbits

May 2, 2015

The 40-73 Tensilbit is a 4 flute, solid carbide, .500″ diameter cutting tool engineered specifically for the high speed machining performed by the Tensilkut I and Tensilkut II.

40-73 Tensilbit

40-73 Tensilbit

Solid carbide Tensilbits are precision manufactured from the finest micrograin carbide, with no taper in the tool diameter, ensuring a consistent finish on your tensile specimens. The 40-73 Tensilbit is recommended for aluminum

40-73 Tensilbit

40-73 Tensilbit

, stainless and hard plastics.

40-71 Tensilbits

May 1, 2015

40-71 Tensilbits are 2 flute, carbide tipped Tensilbits.  They are an economical choice for preparing test specimens from steel, aluminum, copper and brass.  Suitable for use with the 10-20 series through 10-70 series Tensilkut I, and all Tensilkut II machines.

40-71 and 40-72 Tensilbits

40-71 and 40-72 Tensilbits

40-71 Tensilbit

40-71 Tensilbit

 

Changing Tensilbits

April 9, 2015

Tensilbits are designed specifically for use with the Tensilkut I and Tensilkut II series machines.  These carbide bits have a precise diameter with cutting edge angles, rakes and reliefs engineered for optimal surface finish on a variety of materials.  Once a dulled cutting edge on a Tensilbit is noted, do not continue cutting your tensile specimens with that Tensilbit; permanent damage to the Tensilbit, including chipping of the edges can occur, making it impossible to resharpen the Tensilbits for extended use.  A dulled edge will also result in a lesser quality surface finish, yielding inaccurate test results.

Before replacing the Tensilbit, be certain that you’ve used all available sections of your carbide Tensilbit by moving it up and down.  This can be accomplished by loosening the bolt which holds the motor secure within its mount, and twisting the motor to move it up and down, allowing new sections of the carbide flutes on your Tensilbit to be used.

10-33 Tensilkut I

Tensilkut I

To install a new Tensilbit, remove the motor from its mound and loosen the collet with the wrenches provided with your Tensilkut machine.  Remove the worn Tensilbit and insert the new one, sliding it far enough into the collet that it is securely held in place.  Be certain that the chuck, chuck nut and Tensilbit are free of dirt and debris to insure trueness of the bit and accurate alighnment of the carbide cutting edges.

Tensilbits

July 23, 2014

For optimum surface finish and contour duplication on your flat test specimens , you need carbide cutting tools engineered specifically for high speed machining with Tensilkut. Super cutting edge sharpness combined with other angles of cut and relief are essential to achieve the fine shavings required for non deformed specimen edges. We stock a wide variety of Tensilbits for many applications, including various metals, plastics, ceramics, fiberglass, and Kevlar.  Tensilbits are matched to the Tensilkut machine with which they will be used.

 

The picture below shows the 40-70 series half inch diameter Tensilbits, including the 40-71 TiN coated Tensilbit.

40-70 Series Tensilbits for use with Tensilkut I and Tensilkut II

40-70 Series Tensilbits for use with Tensilkut I and Tensilkut II

40-70 Series Tensilbits

November 5, 2013

Tensilbits designed for use with the Tensilkut I and Tensilkut II series machines are essential to preparing your accurate test specimens. They are designed with specific angles, rakes and reliefs for accurate test sample preparation without distortion or tearing of the edges of your specimens. The 40-70 series Tensilbits are all .500″ diameter; all are designed for the best possible cutter life. If not chipped during use, Tensilbits can be resharpened for further use after they have become dull.

40-70 Series Tensilbits

40-70 Series Tensilbits for use with the Tensilkut I and Tensilkut II

Shown above, left to right: 40-71 Tensilbit, 40-72 Tensilbit, 40-73 Tensilbit, 40-74 Tensilbit, 40-75 Tensilbit, 40-76 Tensilbit, 40-71 TiN Coated Tensilbit


Please call, email, or fill out the form above for more information on Tensilbits.